Carbon pack



Nov. 11, 1941. E. CURTIS, JR

CARBON PACK Filed June 30, 1959 INVENTOR EDWARD 14 CURT/S, JR.

ATTORNEY Patented Nov. 11, 1941 UNITED STATES, PATENT OFFICE CARBON PACK Edward W. Curtis, Jr., Moorestown, N. J., as-

signor to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application June 30, 1939, Serial No. 282,027

8 Claims.

This invention relates to carbon packs for manifolding work and more particularly to carbon packs constructed and arranged to receive and carry a series of separate individual work sheets or forms.

The objects of the present invention are to improve the construction and mode of operation of carbon packs of the general type referred to above and to produce a novel and improved pack construction which is inexpensive to manufacture, is efficient in operation, andwhich will result in increasing the life of the carbon sheets embodied therein.

With these objects in view, applicant has produced a pack construction embodying a stop device for limiting the movement of the carbon pack between the platen and'the adjacent paper supporting device of a typewriting machine and a feature of the invention consists in provision for locating the stop device in different positions with relation to the pack to vary the point of impression of the type on the carbon sheets. This will greatly increase the life of the carbon sheets.

In its illustrated form the carbon pack comprises a backing sheet to which the several leaves or sheets of carbon are attached, ha ing a folded over portion at one end thereof, and the stop device consists of a bar mounted within the folded over portion of the backing sheet.

The folded over portion of the back'ng sheet is attached to the body of the pack in a line or strip located some distance below the upper edge of said folded over portion and that part of the folded over portion projecting upwardly beyond the fastening line constitutes a clip to hold the outer work sheet which is inserted between the same and the outer carbon.

The various features of the invention will be clearly understood from the accompanying drawing illustrating the invention in its preferred form and the following detailed description of the construction therein shown.

In the drawing:

Fig. 1 is a perspective view illustrating a carbon set or pack embodying the invention, with the folded over portion of the backing sheet broken away at one point,

Fig. 2 is a view in vertical section illustrating the carbon pack applied to the cylindrical platen of a typewriting machine in position for the insertion of the work sheets in or the iemoval of said sheets from the pack, and

Fig. 3 is a diagrammatic sectional view of the pack taken substantially on the line 3-3 of Fig. 1.

In the form of the inventionillustrated in the drawing of this application, the carbon pack comprises a backing sheet indicated as a whole at 2 and a'set of carbon leaves or sheets 4 applied to the backing sheet in the manner shown particularly in Fig. 1 and. attached at their lower margins to the backing sheet. The backing sheet consists of a sheet of flexible relatively heavy paper having suiiicient stiffn ss to, give body to the pack and to keep the carbons from wrinkling and creasing.

The lower margins of the carbon leaves are inserted between the body 6 of the backing sheet and a folded over portion 8 of said sheet, and are attached in position by a line or strip of fastening means extending transversely of the pack. Preferably the carbon leaves are secured to the backing sheet and to each other and the folded over portion of said sheet is secured to the body of the sheet and to said leaves by a suitable adhesive. In the construction shown, the body 6 of the backing sheet and the folded over portion of said sheet are each provided with a strip of adhesive as indicated at I!) in Fig. 1. The carbon leaves are each formed with a series of aligned slots l2 preferably slightly wider than the strips of adhesive on the two parts of the backing sheet and. each leaf is provided with strips of adhesive as indicated at M, in line with the slots, between the slots and between the outer slots and the outer edges of the sheet preferably onboth sides thereof. These strips of adhesive have substantially the same width as the strips H) on the backing sheet. The backing sheet and the carbon leaves are assembled substantiallyin the relation shown in Fig. l with the adhesive strips on the backing sheet and the slots in the several carbon leaves and the adhesive strips on said leaves immediately over each other orin registration and are pressed together and secured by the adhesive in this relation. In scouring the carbon leaves to the backing sheet, the body of said sheet and the folded over portion thereof are forced together through the slots in said leaves to bring the two adhesive surfaces of the sheet into contact as shown in Fig. 3 in which the thickness of the adhesive is greatly exaggerated. The attachment of the body portion'and folded over portion of the backing sheet together through the slots in the carbon leaves, by the adhesive, forms a secure fastening for holding the leaves in position on the backing sheet. The folded over portion 8 of the backing sheet is extended upwardly beyond the adhesive strip l0, attaching said folded over portion,

to the outer carbon sheet and to the body of the backing, to form a retaining device or clip indicated at l6 between which and the outer carbon leaf, the outer work sheet is inserted as shown particularly in Fig. 3.

The upper margins of the carbon leaves are off,- set with relation to each other as indicated at 18, and 22 to facilitate the interleaving of the work sheets with the carbon leaves. The upper left hand corners of both the backing sheet and the carbon leaves are cut away as indicated at 24 to enable the several work sheets interleaved between the carbon leaves to be simultaneously withdrawn when typed. l Figures 2 and 3 show a series of work sheets indicated at 25 interleaved the sheets of carbon in position for typing.

In placing the 1 type will make their impressions at different points vertically of the carbon leaves respectively when the stop bar is in its two different positions in the pack.

With this construction, the'carbon pack may be used with the stop bar in the position shown work sheets in the carbon pack, the several work sheets are located with their lower edges-respectively in engagement with the upper lines or edges of the attached surfaces of the body and folded over portions of the backing sheet, of the carbon sheets and of the backing and carbon sheets held together by the adhesive strips It and [4' or inengagement with the upper edges of the adhesive strips, if these strips have substantial thickness, these lines or edges forming gages to locate the work sheets in proper position in the pack.

I In placing the carbon pack loaded with individual work sheets in a typewriting "machine, the upper portion of the same is inserted between the cylindrical platen 2'8- and the paper table and the platen is then turned in a clockwise direction (Fig. 2) to bring the outer work sheet into proper typing position. When the typing operation is completed, the platen is turned furtherina clockwise direction until the lower margins of the work sheets are disengaged from between the platen and the opposed paper engaging devices so that the work sheets can then be readily removed from between the carbon leaves.

In order to limit the movement of the pack produced by this rotary movement of the platen, a stop'bar 32 is removably mounted between the body I5 of the backing sheet and the folded over portion 8 of said sheet. In Fig. 1 this stop bar is shown mounted at or adjacent to the' end of the loop 34 at which the body of the backing sheet joins the folded over portion thereof; The stop bar, however, may be mounted between the body of the backing sheet and the folded over portion of said sheet at; a point further from the lower end of the pack as shown in Fig. 2, to shift the point of impression of the type upon the carbon leaves. In the present construction, the pack is provided with a strip of adhesive 36 securing the folded over portion of the backing sheet to thebody thereof adjacent to the loop 34 and, as shown in Fig.2, the stop bar is inserted between the body of the backing sheet and the folded over'portion of the sheet above and relatively close to this line of adhesive.

in Fig. 1, for example, for any desired time and said bar may then be withdrawn from this position and inserted in the position shown in Fig. 2 to shift the points of impression of the type on the carbon sheets, thereby greatly increasing the life of said sheets. v

"The backing sheet preferably extends to the right some distance beyond the carbon leaves as shown in Fig. 1, to provide a margin indicated at 38 upon which one or more scales maybe printed or typed to assist the operator in'var'ious operations. a

In operation, after the completion of the typing of a series of work sheets inserted in the pack, the pack is shifted to the position shown in Fig. 2 by the rotation of the platen for the removal of Y the completed work sheets andthe insertion of a The presence of the stop bar 32 between the bodyportion' of the backing sheet and the folded over portion thereof, spreads relatively these portions of the sheet and produces an enlargement in the thickness of the pack. With the stop bar 32 in either of the above described positions,

constitute a stop to limit. the movement of the new series of work sheets in the pack. Upon the reloading of the pack with the new work sheets, the pack is shifted back to typing position by the reverse rotation of the platen. The pack-may remain in the machine until the carbon leaves are completely worn out. I

a It is to be understood that the invention is not limited to the form thereof illustrated and described in this application or to the particular construction and arrangement of parts in which it is shown as embodied, but that the invention may be embodied in other forms and may include other constructions within the scope of the claims.

Although, in the preferred form of the invention, as illustrated in this application, the pack is provided with a plurality of carbon leaves, certain features of the invention might be employed with advantage in a carbon p'ack having a single carbon leaf. It is to be understood, therefore, that the phrase set of carbon leaves" employed in the claims is not restrictive but applies to a construction in which said set consists of a single carbon leaf or a plurality of leaves.

Having explained the nature and object 'of the invention and having illustrated the described a construction embodying the invention in its preferred form, what is claimed is:

1. A carbon pack for typewriting and similar machines, comprising a backing sheet, a set of carbon leaves attached to said backing sheet'and a stop device mounted on said backing sheet for limiting the movement of the pack between the platen and-the opposed paper engaging devices of a typewriter, the backing sheet having provision for holding the stop device alternatively in two different predetermined positions with relation to the backing sheet to change the impression point of the type with relation to the carbon leaves.

2. A manifolding pack for typewriting and similar machines, comprising a supporting sheet and one or more transfer sheets attached to said supporting sheet, a stop bar mounted upon said supporting sheet and extending across the same for limiting the movement of the pack between the platen and the opposed paper supporting devices of a typewriting machine, the supporting sheet having provision for holding the stop device alternatively in two different predetermined positions relatively to the backing sheet to change the impression point of the type with relation to the transfer sheets.

3. A carbon pack for typewriting and similar machines, comprising a backing sheet having a body and a folded over portion at one end of said body, one or more carbon leaves attached to said backing sheet between the body and the folded over portion of said backing sheet, a stop bar mounted between the folded over portion of said sheet and the body thereof and means for holding said bar alternatively in either of two different positions longitudinally of the pack.

4. A manifolding pack comprising one or more transfer leaves, a backing sheet to which said transfer leaves are secured, having a portion at the lower end of the backing sheet folded over upon the body of said sheet to form a loop, means for securing the folded over portion of said sheet to the body thereof at a predetermined distance from the lower end of the pack, a stop bar mounted between the body of the backing sheet and the folded over portion thereof andmeans for locating said bar alternatively in a position relatively adjacent the end of the loop or in a position more remote from the end of the loop.

5. A carbon pack for typewriting and similar machines comprising a set of carbon leaves, means for securing said leaves together at one end thereof to form a pack, a stop device for limiting the movement of the pack between the platen and the opposed paper engaging devices of a typewriting machine and means for holding the stop device in either of two different positions with relation to the pack.

6. A manifolding pack arranged to be loaded successively with series of individual work sheets and comprising a backing sheet having a body and a folded over portion at one end of the body, a set of transfer leaves attached to said backing sheet between the body and the folded over portion thereof, means for fastening said folded over portion and the transfer leaves to the body of said backing sheet all at substantially the same distance from the fold such as to enable the backing sheet below the transfer leaves to be held between the platen and opposed paper holding devices of a typewriter while the said leaves are disengaged from between the platen and said devices up to the upper line of said fastening means, said fastening means being arranged to be engaged by the lower edges of the work sheets to locate the sheets in proper positions in the pack and a stop device secured to' the folded over portion of the backing sheet in predetermined relation to the fold and arranged to limit the movement of the pack betweenthe platen and said holding devices when the transfer leaves have been disengaged from between the platen and said holding devices up to said line.

'7. A manifolding device for typewriting and similar machines comprising one or more transfer sheets, a stop device for limiting the movement of the manifolding device between the platen and the opposed paper engaging devices of a typewriting machine and means for holding the stop device alternatively in either of two different positions with relation to said sheets.

8. A manifolding device for typewriting and similar machines comprising one or more carbon leaves, a support for said leaves, a stop device carried by said support for limiting the movement of said device past the platen of a typewriting machine and means for locating the stop device alternatively in either of two different positions with relation to the support.

EDWARD W. CURTIS, JR. 

